Answer:
4
Step-by-step explanation:
The factors of 84 are: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
The factors of 100 are: 1, 2, 4, 5, 10, 20, 25, 50, 100
They have 4 in common
100 = 2*2*5*5
84 = 2*2*3*4
the greatest common factor is a prime number whit most appearance in both numbers:
in this case the prime number is 2 and it is repeated twice in both numbers, hence 2*2 = 4
x=3
yes the values in the table are proportional
3.5
[(3 x 2) - 2 x 1.25] = [6 - 2 x 1.25]
= [6 - 2.5]
= 3.5
D, 2(b-1)/ab
subtract 2+b/ab from 3/a
it means 3/a - 2+b/ab
lcm is ab
(3b-(2+b))/ab
(3b-2-b)/ab
(3b-b-2)/ab
(2b-2)/ab
2(b-1)/ab
